v3.20.4
LEASES - Lease terms and discount rates (Details)
Dec. 31, 2020
LEASES  
Operating leases, weighted average remaining lease term 10 years 4 months 24 days
Finance leases, weighted average remaining lease term 12 years 10 months 24 days
Operating leases, weighted average discount rate 9.80%
Finance leases, weighted average discount rate 6.90%